Today we got another m400 in the team. The laptop came with the Toshiba Slice Expansion 6-Cell Li-Ion Battery Pack which I immediately took borrowed. I am just charging the batteries and will then try the uptime using both batteries with Toshiba’s balanced and power saver settings. The Toshiba web page promises about 9 hours uptime using the extension, so we will see how my machine drains the batteries…